My Tank is cursed...need help!!

[Galizio]

Filter socks could be a no3 factory, especially if not changed frequently, I change mine 3-4 days routine.
Be helpful if you post all your parameter, calcium looks a bit high, also what kind of corals,did you change the intensity of your lighting,


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[patpare]

What are you using for light? Could be too intense on the affected corals?

[Amadod2]

i tested all my levels, cal 490, alk, 7.9, P04-0, ammonia 0, nitrate 0, nitrite 0...i took the filter socks off yesterday. and i run T5 6bulbs. the only thing i can think of are the filter socks